Nut and nut-lock



(No Model.)

H..A. SON.

NUT AND "LOOK. H k No. 605,578 Patenfied June 14,1898.

wfize'ases: Ira 6rd??? PATENT 'rrrcs.

HENRY A. I'IUTSON, OF CHICAGO, ILLINOIS.

-N,U T AND NUT-.LO'C'K.

I SPECIFICATION forming part of Letters Patent No. 605,578, dated June 14, 1898. t nct ia lua Ianuary 15,1s97. SerialNo.61 9,344. (remade) To all whom/it may concern: i

Be it known that I, HENRYA. l-IUTSON, a citizen of the United States,-residingat the city of Chicago, county of Cook; State of Illinois, have invented a new and useful Improvement in Nuts and Nut-Locks,-of which the following is a specification.

My invention relates to nuts to be locked on screw-threaded bolts or axles; and the objects of myinvention are to provide a simple convenient device with slight change of the usual form of nuts in common use and at small initial cost, aided by an attachable and detachable keyto securely fasten the nut against jarring loose, and thereafter to fasten:

the key equally secure. I attain these objects by the mechanism; illustrated in the accomk the line a; y in Fig. 1. Fig. 3 is a side view of the nut and keyv drivento place when the nut is locked, the'key being secured by bending its small end down over the nut. Fig. 4 is a side view showing the key 0 wedged in the thread of the bolt B, the rib being omitted to show the relation of the key to the thread of the bolt. Fig. 5 is a side view of the nut A, showing the top to be an inclined plane, with ribs or flanges a a omitted to show the relation of the key to the thread of the bolt and the key c'cutting diagonally across a screw-thread in the bolt. Fig. 6 is a perspective View of the key. Fig. 7 is also a perspective view of the key, showing its edges beveled and serrated.

Similar letters refer to similar parts throu ghout the several views.

Fig. 1 illustrates the form of the nut A, which is flatorplane centrally, the two opposite sides slightly projecting above the plane, forming ribs or flanges a a, against which a' tapering key 0 is driven between the bolt B and the rib or flange a cron either or both sides so tightly as to render a movement of the nut backward impossible.

To prevent the key 0 from being crowded or forced out of place in the key-seat, and contact against the rib or flange a a thereby relieved, a rabbeted groove a" (1* is made in the rib or flange a c'for the key to travel in on one side, the corresponding groove for the opposite side of key 0 being the groove between two threads 'of the screw in bolt B for apart of itscourse, then coming in contact with a thread, cutting or plowing its way through the same.

The form of nut as shown in Figs. 1, 2, 3, 4:, and 5 is complete as it comes from the die of the stamp-machine, showing flat or inclined face, as desired, with ribs or flanges c a on adjacent sides, which afterward require to be'undercut for grooves a* for key 0 to travel in.

Key 0, as shown in Figs. 1, 2, 3, 4, 5, 6, and 7, is a flat tapering wedge, with beveled edges conforming to the undercut grooves a a 'of 'nutA, together with the spacebetween two screw-threads in bolt B and serrated, when necessary, and is preferably made of steel slightly hardened. When key 0 has been driven tightly into the key-seat, as shown in Fig. 3, the smaller end is struck down sharply and the projection bent over the nut, forming a sharp angle, rendering its withdrawal or loosening impossible until the bent projecting end is out 01f or straightened, when the key may be Withdrawn. I

Key 0 may be driven on either side of the bolt B, or two keys may be used to lock one nut, though it will be found that one key will be amply suilicient to stay any nut permanently. It will appear, however, that only one side of the bolt will afford a perfectly flat key-seat for the key, as only on one side of the bolt the groove between two threads will be in line with the plane, and then only part way, and the corresponding grooves (0* a* in the rib or flange a a.

r Fig. 4 is a side View showing key c in contact with bolt Bqbetween threads part Way only, then crossing a thread in making its way through to the opposite side of nut A.

Fig. 5 is a side view of nut A, having unequal sides and face on an incline, showing key 0 cutting through a screw-thread in bolt 13. This form of nut differs from the square or flat-faced nut only on the inclination of the face, key 0 working in the same manner in the grooves (1* a* in ribs or flanges a a.

Vhere there is extraordinary tendency to loosen nut A by rapid motion or greatstrain, this form of nut enables the key 0 to hold more rigidly by reason of the key cuttingan acute angular recess obliquely across the thread, which is firmly engaged by the key, locking the nut precisely at the position to which it is turned upon the bolt without mutilating the thread or obstructing the bolt when the key is withdrawn. The flat-faced nut permits similar service of the key on one side of the bolt only in a more acute angle of action across the thread.

Figs. 6 and 7 show the key smooth and serrated, which is similarly bent over the nut A after being driven to place.

\Vhat I claim, and desire to secure by Letters Patent, is

1. The nut the face of which is inclined, the opposite inclined margins having ribs a (4 extending across the inclined face of the nut, and grooved or undercut in an acute angle on the sides of the ribs facing the center of the nut, substantially as described and for the purposes set forth.

2. The combination of a flat tapering key 0 with acuteangled edges beveled on the upper side; with a nut flat on its face, provided with marginal ribs a a on two opposite sides, undercut in correspondence with the bevel of key 0, on the sides facing the center of the nut; and bolt 13; the edges of the key on one side sliding in the grooves of the ribs, and on the other side cutting an angular recess obliquely across the thread of the bolt, and engaging the recess cut in the thread, locking the nut, the small end of key 0 bent down over the margin of the nut; all constructed,

combined and operating substantially as described.

The combination of a Hat tapering key 0, with acute-angled edges, beveled on the upper side, serrated; and a nut flat on its face, provided with marginal ribs (4 a on two 0pposite sides, undercut in correspondence with the bevel of key 0, on the sides facing the center of the nut; and bolt 13; the edges of the key on one side sliding in the grooves of the ribs and on the other side cutting an a11- gular recess obliquely across the thread of the bolt and engaging the recess cut in the thread, locking the nut, the small end of key 0 bent down over the margin of the nut; all constructed,combined and operating substantially as described.

4. The combination of a flat tapering key 0, with acute angular edges, beveled on the upper side; with a nut A, having its face inclined and provided with ribs a a on the inclined margins of the nut, undercut orgrooved on the sides of the ribs facing the center of the nut, the angular section of the grooves corresponding with the bevel of the key a; and bolt B; the key 0 driven and cutting obliquely across the thread of the bolt, cutting an oblique recess across the thread of the bolt and engaging the recess so cut by the key, locking the nut, upon the bolt, the small end of key 0 bent down over the margin of the nut; all constructed, combined and operating substantially as and for the purposes set forth.

HENRY A. nU'rsoN.

\Vitncsses:

MARY O. Isnlxn, BURT BRETT. 

